Pools & Traits
This field tracks how allele frequencies change in populations over time.
Population genetics
This model is the no-change picture of allele frequencies.
Hardy–Weinberg
Alleles moving from one population into another is this.
Gene flow
Random wobble in allele frequencies from one generation to the next is this.
Genetic drift
Mating of close relatives is this.
Inbreeding
All alleles of all genes in a population make up this.
The gene pool
Allele frequencies of A and a must add to this number.
1
Frequency shifts inside one species are this kind of evolution.
Microevolution
Drift matters more when the population is this size.
Small
Harmful recessives showing up after inbreeding cause this drop in fitness.
Inbreeding depression
A trait that exists as two or more distinct forms in one population is this.
Polymorphic
The five “no change” conditions include no mutation, no selection, no migration, random mating, and this.
Infinite population size
During the Ice Age, this animal underwent a population crash
Cheetah
Chance removing an allele from a group is this.
Fixation
Genetically identical twins are also called this.
Monozygotic
This recessive disorder deforms red cells and cuts oxygen delivery.
Sickle-cell anemia
Hardy–Weinberg is used as this kind of hypothesis: assume the effect is absent.
A null hypothesis
Crossing-over and mutation are named as the two main sources of this.
Genetic variation
A crash that slashes population size is this.
A population bottleneck
That allele stays common in parts of Africa because heterozygotes resist this disease.
Malaria
If AA, Aa, and aa frequencies do not match the Hardy-Weinberg model, this process may have occurred.
Natural selection
After the crash, the new group’s gene pool no longer matching the old one is this effect.
The founder effect
Infinite population size is assumed so that this chance process can be ignored.
Genetic drift
Recessives pile up in a family and become homozygous when relatives breed because each parent can pass this.
The same harmful recessive allele